From WordNet (r) 3.0 (2006) [wn]:
plaza
n 1: a public square with room for pedestrians; "they met at Elm
Plaza"; "Grosvenor Place" [syn: plaza, place, piazza]
2: mercantile establishment consisting of a carefully landscaped
complex of shops representing leading merchandisers; usually
includes restaurants and a convenient parking area; a modern
version of the traditional marketplace; "a good plaza should
have a movie house"; "they spent their weekends at the local
malls" [syn: plaza, mall, center, shopping mall,
shopping center, shopping centre]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Plaza \Pla"za\, n. [Sp. See Place.]
A public square in a city or town.
[1913 Webster]